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Environmental Chemistry — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryEnvironmental Chemistry3 Marks
Question
Carbon monoxide gas is more dangerous than carbon dioxide gas. Why?
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Answer

Carbon monoxide combines with haemoglobin to form a very stable compound known as carboxyhaemoglobin when its concentration in blood reaches 3 - 4%, the oxygen carrying capacity of the blood is greatly reduced. This results into headache, nervousness and sometimes death of the person. On the other hand $\mathrm{CO}_2$ does not combine with haemoglobin and hence is less harmful than CO.

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